George h



' No. 87,569. h I v PATENTED MAR.9,1869. a

\ G. H. JOHNSON.

BRAGING FOR GYLINDRIGAL VSTRUOTURBS.

1&1. W v I I Q Inwnlmk mm igma v. GE H5? J O' N S O N 0 F B U FIF A L 0, NE w Y on K.

' Letters 3mm No. 87,569, and March 9, 1869.

whom meme ron crnrwnnrcan s'mrrcmmns 'lhcflchsdulo'rshrmdtolnthnu immimum and rulklngpnstoltholnm- T0 at} ivlunn it may concern.-

' heitknownthat I, Gnondn H.Jomrson; of Bufialo, l

in the countygof Erie, and State of New York, have invented a new and useful Improvement in. Bracing and Strengthening the Walls of Gylindrical or Polygonal Structures, and- I do hereby declare the followingto he a full and exact description thereof, reference being bad to the-accompanying drawings, forming a part of this specification, in which+ 1 is an elevation, partially in section, of a oylin 'cal bin partially-constructed. v r t, Figure 2,a similar view of-acylindrical bin, strengtherred by tension-bars, or hands alone. a, Figure 3 illustrates difi'erent forms and descriptions of vertical stay-rods,-'or bars.

Similar letters indicate like" parts in each of, the druwings,

My'invention relates to a new and improved mode of bracing and strengthening the walls 'o cylindrical or 'polygo a1 grain-bins, and like structures, by means of iron steys and supports; and It consists w First, in the insertionef a series of'horizontal annu-. lar tension-bars, at suitable intervals, within the ciroue lar onpolygonal walls of such structures, the ends of each bar being so united as that it shall form an endunbroken band,' or circle, within the wall; and,

Second, in the combination, with such horizontal endless tension-bars, of vertical connecting-rods or plates, so as to form a metallic frame within the wall of the structure, 1

My invention is especially designed for the purpose of strengthenin the hollow walls of cylindrical grain bins construe of brick.

cretofore, such walls have been strengthened by ters Pate have heretofore been granted, 1 insert, at

regular intervals within the interior space, 0, of the hollow'wall of a cylindrical grain-bin, A, wrought-iron bars, or rods, B, of cornpmntit el'v small diameter.

The bars B are bent to conform to the curve of the wall, and are laid horizontally, at equal distances apart, upon the courses of brick, as they are laid up, so asrto extend within the hollow space 0.02 the wall. Their ends are threaded to the right and left, respectively, so

a that when they meet they may he caught and drawn.

. ,siiitableinauner. means of iron bond-plateseast in sections, and laidl" se y a right and lefir-threaded '11, y my of which the circumference of the circular band, formed by the tension-rod, or bar, may be tightened and reducedas required, after it has been placed in position upon the 'conrse of bricks in the vwall.

Although I prefer to use one continuous bar ln fort!- ing the circular band B, it may be formed by two or m'o'tb rods, or sections united by nuts or otherwise, to form unbroken band, as'described.

It is evident that the thrust, or strain, upon such. bands, orannnlar tcnsion-hars, created by the outward 1 pressure of a mass of grain within thecylindricsl bin, tending to spread open and separate the arch ofth'e walls, will operate to burst, or break asunder the bands,

and hence, act upon them wholly'in the direction of their length, so that the strain thereon will be a tensile one, which will be resisted by the maximum strength of the metal. I am, therefore, enabled to use a com paratively small, light rod, in forming the bands to-be used in combination with the brick wall, and-yet ob tain therein suilicient strengthto resist all possible strain thereon, and I thus gain therequisite sustain= in'g-force with far less expense than in the use ofthe old forms of bond-plates.-

' In order to strengthen the 'cjdinders of masonry vertically,s2s well as laterally or radially, I combine, with i the horizontal annular/tension-rods B, vertical rods-or plates, E, extending, within .the hollow space a, from the top to the bottom of the wall, and. which are cornbined with the series of horizontal annular tension rods, eitherby means ofieyes, formed at proper intr vols alongtheir length, throughzwlrioh the horizontal;

barsghall beinserted, as illustrated in. figs. 1 and-30f thedrawings, or by, being secured thereto in any other mr-mds E y b me, new

bars, a, fig. 3,0: of angle-ham a, or T-bars,-e.

are firmly secured at the bottom to the foundation of thestructure, and are made to'clarnp it down firmly and securely, by means of nuts bearing upon plates on the upper surface of the walls, so as tov tie and iirinly clamp the w lrole..struct-ure together upon its .founda tion, and, in combination with the annular bands, they constituteusupporting'frame for the masonry, which 'will impartthereto immense strength, iu proportionto the thickness of the walls. Thewalls thus strengthenedai'e also left perfectly clear, smooth, and uniforroin surihce' and finish, both .within andwithout.

Although-my invention is more especially adapted to light, hollo.w walls, made of porous bricks, such as are preferable in the'mnstmction of grauaries, 1 con template the application them-ct 'to the construction of solid walls, as I obtain thereby great strength the wn-lhut greatly less expense than by any of the methods heretoibre' desi med or employeihfand art-the same time produce a we] having a smooth, even sun face on both sides thereof. I

Baring thnsl'nll described my luveniiou,

I plsim as new, and desire to secure lay-Letters Patent- 1. A series of annular tension-bars, or rods, placed horizontally within the walls of cylindrical or polygonal elevator grain bins, or other similar structures of ma sonry, and 'combined therewith, substantially in the manner h'erein set'forth.

2. In vcombination with a series of horizontal annu- 1N tension-bars, or rods, inserted within the walls of a grain-bin or other cylindrical or polygonal structure of masonry, veniesl bars or plates, framed and univeci'or secured to saidten; on-bars, substantially as herein 

